Expanding die or tool.



E, F."HULBERT. EXPANDINQ DIE 0R TooL, APPLICATION FILED MAY 21,1914.LMhQQ/ Patented July 4, 1916.

2 SHEETS-SHEET l.

WITNIIESSES y INVENTOR E. F. HULBERT. EXPANDIN'G DIE'OR TOOL.APPLICATION FILED ffl/w21. 1914.

DU www# 70 W MH 5 m Lw m um mw ,W @uw www wm m37 A /M dies.

The invention consists in an expanding,

UNITED sTATEs PATENT oEEICE.

EDWIN F. HULlBERT, Olli" SOUTH NORWALK, CONNECTICUT, ASSIGNOR TONATIONAL PAPER CAN COMPANY, SOUTH NORWALK, CONNECTICUT, A CORPORATION FDELAWARE.

7o ZZ whom t may concern:

Be it known that I, EnwIN HULnEnT, a citizen of the United States.residing at South Norwalk, in the county of Fairfield and State ofConnecticut, have invented a new and useful Improvement in ExpandingDies or Tools, of which the following is a full,` clear, and exactdescription, reference being had to the accompanying drawings,

formingV part of this specification, in which:

4r and 5 are detail views of the expanding wedges. Fig. 6 is a plan Viewof one of the expanding sections. Fig. 7 is a front view of the same.Fig. 8 is a-view similar to F igfl, showing the parts in contractedpositioii, and Figs. 9 and l() are cross sections silnilar to Fig. 2showing other forms of the die or'tool.

My invention relates to the securing of closures within the ends of cansor receptacles and is designed to )rovide an ex anding tool or die whichwill do away with the need for a supporting mandrel within thevreceptacle and will co-act with external dies to properly bead or shapethe end portion of the receptacle for co-action with the closure. Thetool is also adapted to be used forv securing the closure 1n place and`1s 111-' tended to act upon both the flange of the closure and the wallof the receptacle by' jointly beading them and (zo-acting with an enddie and outside supporting anvils or die or tool which may be insertedWithin 4o the end of the receptacle, and preferably within the flange ofthe closure while in place within the end of the receptacle; the tubeacting to bead and shape the end portion of the receptacle, togetherwith the cir- 4 5 cular flange of the closure.

In the drawings, referring to the form of Figs. l to S inclusive, 2represents a'die segment, such as shown'in Figs. 6 and 7. The externalsurface of this section or segment forms the arc of a circle andpreferably has the step formation shown, although this may be variedaccording to the requirements of the other dies.

Specification of Letters Patent.

.shaped segments of the die or tool.

EXPANDING DIE on TooL."VY

Patented July 4, 1916.

Application led May 21, 1914. Serial No. 839,995.

As shown, the lowest portion of largest diameter 3 forms a projectinglip adapted to form a bead inthe closure and end por` tion of 'thereceptacle when the parts are' expanded. The neck I is adapted toreceive a portion of the seam when engaged by a'nother end moving diemoving at right angles to the plane of the die or tool shown. Eachsegment is provided along its angular inner portions with cam recesses-5which are engaged bythe depending side lips or projections() of thewedges 7. Each wedge has two of these depending lips, which lips engageeach a camgroove of one of the are- The outer projecting .portion 8 ofeach wedge is shaped to correspond with the portions 3 'and 4 of thesegments so that when the parts are in expanded position, as shown inFig. l, a complete circular die is formed.

The -dies andl vwedges are assemblech as shown in Fig. 8, the sideportions of the wedges preferably fitting against each other and asshown in Fig. 8 the segments are in their contracted positions. 'Theparts in this position are inserted within the flange of a closurewithin the end of a' receptacle and an expanding device is then employedwithin the tool to expand the parts into concentric angle or die whichcontracts in forming the bead.

In Figs. 9 and 10, I show tools corresponding to those shown -i'n- Figs.1 to 8, ex-

cept that the end portions 3 anclb are modified to give successiveoperations-in the forming of the complete seam closure between the capand the body of the receptacle.

The device is preferably made in eight pieces, four segments and fourwedges, as this gives sufficient expanding and contractf ing capacity,though a larger number may be used" if desired. The construction isstrong and allows the. exertion of heavy pressures; the movements ofnthesegments are positive in both directions; by reason of the tongue andgroove engagement of the wedges therewith, and .the tool does away withthe need for inserting mandrels inside thereceptacle beyond the cap.

Heretofore, such `closures could only be seamed at one end of thereceptacle on account of the necessary presence of the internalsupporting mandrel, while my invenltion enables the support to beapplied at both ends, as the die is not withinthe receptacle body and nOmandrel is needed. When expanded, a true circle is afforded, thus givingthe desired action at all points around the closure and body while thedie can easily be' contracted and withdrawn clear from the work beingdone.

The amount O movement may be increased ordec-reased by varying the angleoi' the dove-tails Or engaged cam grooves. between the Wedges andsegments, and other variations mayl be-made without departing from myinvention.

I claim: v '1. An expanding' tool or die comprising a,

pluralityof segments having external diey having external diel portions,the external .ries of segments with beading portionsarranged to bead thewall of the receptacle or closure, and wedges arranged to expand thesegments and having edge portions similar to the segments and forming acontinuation ,thereof when thel parts are expanded; substantially asdescribed. I

4. An expanding tool or die, comprising a series of expanding segmentseaeh having an arc-shaped outer -surfaeevvith angular inner portions,and a` series of Wedges co-acting therewith, said wedges having tongueand groove engagement with the inner 'inclined portions of thesegments'and provided with outer portions shaped similar to the outerportions of the segments, the parts when expanded forming acompleteeircle of similar contour throughout g' substantially .asdescribed. y

, 5. An expanding tool or die, comprising at least four segments, eachhaving an Outer shaping surface, combined with at least four expandingwedges movable along angular portions of the segments and engaged there-\vith.to positively move the saine, the Wedges having outer shapingsurfaces corresponding to the outer shaping 4surfaces of thevsegments;substantially as described.

In testimony whereof, I have hereunto set my hand.

EDWIN F. HULBERT.

lVitnesses: i v

MARION H. ROBERTS, JOHN B. LAWRENCE.I

